Spin-state-associated ligand distortion and complex solution equilibrium for a pair of Fe(II) pyridyl-imidazoline complexes

被引：1

作者：

Schulte, Kelsey A. ^{[1
]}

Fiedler, Stephanie R. ^{[1
]}

Shores, Matthew P. ^{[1
]}

机构：

[1] Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA

来源：

POLYHEDRON | 2015年 / 85卷

基金：

美国国家科学基金会;

关键词：

Iron; Ligand distortion; Magnetic properties; Solution equilibria; Spin-state switching; IRON(II); COMPLEXES;

D O I：

10.1016/j.poly.2014.09.007

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Reported herein are the magnetic and structural properties as well as solution equilibrium investigation for a Pair of iron (II) pyridyl-imidazoline complexes: [Fe(pizMe)Cl-2](2) (1) and [Fe(pizMe)(3)](FeCl4) (2), where pizMe = 2-(2'-pyridinyl)-4,5-dihydro-1-methylimidazole. Dinuclear complex 1 contains high-spin iron (II) centers and a "flat" pizMe ligand (planar at the imidazoline N atom), while the pizMe-containing complex in 2 exhibits characteristics of a low-spin iron (II) center and a pyramidalized pizMe ligand. In solution, the two complexes are present in equilibrium as evinced through NMR and electronic absorption spectral studies. Spin-state switching between 1 and 2 in methanolic solution is a result of ligand lability. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：560 / 564

页数：5

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